When should a first responder use the Table of Isolation and Protective Action Distances?

A first responder should use the Table of Isolation and Protective Action Distances during hazardous materials incidents, particularly when assessing the potential impact of a release of toxic substances. This table helps determine safe distances for evacuation and protective actions based on the specific hazardous material involved, its quantity, and the prevailing environmental conditions. It is crucial for ensuring the safety of both responders and the public in the vicinity of the incident.